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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.2: Computer Technology; 20050717-21; Denver,CO(US) >GEOMETRIC NON LINEAR ANALYSIS OF COMPOSITE SHELLS UNDER THERMOMECHANICAL LOADING
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GEOMETRIC NON LINEAR ANALYSIS OF COMPOSITE SHELLS UNDER THERMOMECHANICAL LOADING

机译：热力载荷作用下复合材料壳的几何非线性分析

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摘要

A Geometric non-linear analysis of composite shells under thermomechanical loading has been discussed here. From the literature, it may be seen that the thermal stress analysis of structural elements has continued to remain a research topic for a couple of decades. No one computationally verified the geometric non-linear buckling of composite shells under thermomechanical loading using semiloof element. In this work, linear buckling analysis of Kari Thangaratnam (2) is extended to geometric non-linear analysis of composite shells under thermomechanical loading. A general shell element called the semiloof shell element has been extended to thermal stress analysis of laminated shells. The formulation is based on nonlinear theory and the finite element method using semiloof element. The validation checks on the program are carried out using results on homogeneous isotropic shells available in the literature. The parameters considered in analysis are (1) number of layers in the laminate, (2) Lay-up sequence (symmetry, antisymmetry, cross - ply etc.), (3) Fibre orientation angle, (4) Different aspect ratios, (5) Orthotrophy ratio, (6) Boundary conditions (simply supported, clamped and combination of boundary conditions).
机译：本文讨论了热力作用下复合材料壳体的几何非线性分析。从文献中可以看出，结构元件的热应力分析已经持续了几十年的研究课题。没有人用半屋面单元通过计算验证热力学载荷作用下复合材料壳的几何非线性屈曲。在这项工作中，将Kari Thangaratnam（2）的线性屈曲分析扩展到热力学载荷下复合材料壳的几何非线性分析。通用的壳单元（称为半顶壳单元）已扩展到层压壳的热应力分析。该公式是基于非线性理论和使用半顶单元的有限元方法。使用文献中提供的均质各向同性壳体的结果对程序进行验证检查。分析中考虑的参数是（1）层压板的层数，（2）铺层顺序（对称，反对称，交叉等），（3）纤维取向角，（4）不同的长宽比，（ 5）正交营养比，（6）边界条件（简单支撑，约束和边界条件的组合）。

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